I think a issue that people don't realize would cone up if there was an easy mode coil with no rewards is that since there no reason to repeat it there be less people in the long run doing it. Unless there was a roulette for it no one would likely do it more then once. In the end it would end up how low lv dungeons were before roulettes, people who miss the first rush get stuck on it for hours or days just trying to get in.